Verb conjugation of "leugnen" in German

Everyone told me that I am crazy to take a small child on a road trip but I think it is the best age because babies sleep the entire day and they usually behave nicely in the car. Of course there are many exceptions to this rule.
You have to be careful when you go on summer vacation. There are many dangers but the most dangerous one is the sun itself, because if you're not careful it may harm you. People underestimate the rays.
Germany has a very diverse geography in the North we have the port cities of Hamburg and Bremen, and people are more open, there are a few hills up there. Then you should also visit Berlin.